Oxygen concentrations in excess of 23% increase the hazard exposure to personnel and material.

氧浓度超过23%增加了暴露于其中的人员和材料的危险。

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Oxygen concentrations in excess of 23% increase the hazard exposure to personnel and material.

氧浓度超过23%增加了暴露于其中的人员和材料的危险。

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